I need some advice on gaining width on my lats, currently they are quite thick but lacking in width.
This is my workout for lats:-

Wide grip lat pulldowns behind neck: 12reps warm-up, 10,10,8,6,4 reps.
Bent-over rows: 12,10,8,6,4 reps.
Seated rows: 10,8,6 reps.

My training partner suggested using a narrow grip when doing bent-over rows, he claimed this would target the outer lats. Is this correct?